ref: a3dadbb7da20c3d408bc4df8f4a4e330c31ce28b
dir: /sys/src/cmd/unix/drawterm/libsec/prng.c/
#include "os.h"
#include <mp.h>
#include <libsec.h>
//
// just use the libc prng to fill a buffer
//
void
prng(uchar *p, int n)
{
uchar *e;
for(e = p+n; p < e; p++)
*p = rand();
}